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Results for unconformity:

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unconformity

CATEGORY: geology
DEFINITION: A surface representing a major period of erosion before new sediments are deposited; a surface of non-deposition that is a break between two rock or sediment units. They may represent substantial periods for which a depositional record is lacking.

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disconformity

CATEGORY: geology
DEFINITION: A geological term referring to a weathered surface of a soil or rock stratum covered by an overlying stratum. This type of unconformity separates two parallel strata is characterized by the weathered surface of the older stratum and indicates a lapse of time before the deposition of the younger stratum. Its recognition is important in site stratigraphy.